Determine Ubuntu Filesystem Type
Ever connected a hard disk to your computer without knowing how the partitions are formatted, or even what type of formatting? This surprisingly hard-to-find utility reveals all:
just replace sdb1 with your drive.
fstype prints something like this:
I have no idea why the hide this under /usr/lib/klibc/bin. Other applications in the klibc-utils package get mapped to more reasonable locations.